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ST 650V SiC Diodes Offer Unique Dual Configurations for Increased Safety, Energy Efficiency, and Space Savings

2014/09/16STMicroelectronics  Analog

 

Silicon Carbide Diodes

 

To meet the latest stringent efficiency regulations (Energy Star, 80Plus, European Efficiency), power-supply designers must consider the use of new power converter topologies and more efficient electronic components such as high-voltage silicon-carbide (SiC) Schottky rectifiers.
ST’s SiC diodes take advantage of silicon carbide’s superior physical characteristics over Si, with 4 times better dynamic characteristics and 15% less forward voltage, VF.

 

In hard-switching applications such as high-end-server and telecom power supplies, SiC Schottky diodes show a significant power-loss reduction and are commonly used. They are also increasingly being used in solar inverters, motor drives, uninterruptible power supplies (UPS) and electrical vehicle (EV) applications.

 

ST now provides a full family of SiC diodes, ranging from 600 V to 1200 V including single and dual diodes. These products are available in a variety of packages from DPAK to TO-247, including insulated TO-220AB/AC, and offer great flexibility to designers looking for efficiency, robustness, and reduced time to market and cost.

 

SiC diodes – now in TO-220AB/AC Insulated packages


Seven SiC diodes are now available in the TO-220AB Ins and TO-220AC Ins insulated packages with internal insulation between the silicon and the metal tab of the package. These packages provide a thermal resistance junction to heatsink (Rth(j-hs)) equivalent to or better than using external insulating foils while eliminating the fiddly, time consuming and error prone process of mounting the external insulation foil with heatsink compound between the package and the heatsink. They provide approximately 50% lower Rth(j-hs) compared to the TO-220FP package and one customer estimated that they saved approximately 20 seconds per diode in assembly time in the manufacture of their SMPS which yielded a 1% increase in units per hour on their manufacturing line.


Four 650V single diodes from 4 A to 10 A (STPSCxxH065DI) are available in the TO-220AC Ins package and three 650V dual in-series diodes from 6 A to 10 A (STPSCxxTH13TI) are available in the TO-220AB Ins package.


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